/usr/share/perl5/PPIx/Regexp/Node/Range.pm is in libppix-regexp-perl 0.055-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | =head1 NAME
PPIx::Regexp::Node::Range - Represent a character range in a character class
=head1 SYNOPSIS
use PPIx::Regexp::Dumper;
PPIx::Regexp::Dumper->new( 'qr{[a-z]}smx' )
->print();
=head1 INHERITANCE
C<PPIx::Regexp::Node::Range> is a
L<PPIx::Regexp::Node|PPIx::Regexp::Node>.
C<PPIx::Regexp::Node::Range> has no descendants.
=head1 DESCRIPTION
This class represents a character range in a character class. It is a
node rather than a structure because there are no delimiters. The
content is simply the two literals with the '-' operator between them.
=head1 METHODS
This class provides no public methods beyond those provided by its
superclass.
=cut
package PPIx::Regexp::Node::Range;
use strict;
use warnings;
use base qw{ PPIx::Regexp::Node };
use PPIx::Regexp::Constant qw{ MSG_PROHIBITED_BY_STRICT };
our $VERSION = '0.055';
sub explain {
my ( $self ) = @_;
my $first = $self->schild( 0 )
or return $self->__no_explanation();
my $last = $self->schild( -1 )
or return $self->__no_explanation();
return sprintf q<Characters between '%s' and '%s' inclusive>,
$first->content(), $last->content();
}
sub __PPIX_LEXER__finalize {
my ( $self, $lexer ) = @_;
my $rslt = $self->SUPER::__PPIX_LEXER__finalize( $lexer );
if ( $lexer->strict() ) {
# If strict is in effect, we're an error unless both ends of the
# range are portable.
my @kids = $self->schildren();
delete $self->{_range_start}; # Context for compatibility.
foreach my $inx ( 0, -1 ) {
my $kid = $kids[$inx];
# If we're not a literal, we can not make the test, so we
# blindly accept it.
$kid->isa( 'PPIx::Regexp::Token::Literal' )
or next;
my $content = $kid->content();
$content =~ m/ \A (?: [[:alnum:]] | \\N\{ .* \} ) \z /smx
and $self->_range_ends_compatible( $content )
or return $self->_prohibited_by_strict( $rslt );
}
}
return $rslt;
}
sub _prohibited_by_strict {
my ( $self, $rslt ) = @_;
delete $self->{_range_start};
$rslt += $self->__error(
join( ' ', 'Non-portable range ends', MSG_PROHIBITED_BY_STRICT ),
perl_version_introduced => '5.023008',
);
return $rslt;
}
sub _range_ends_compatible {
my ( $self, $content ) = @_;
if ( defined( my $start = $self->{_range_start} ) ) {
foreach my $re (
qr{ \A [[:upper:]] \z }smx,
qr{ \A [[:lower:]] \z }smx,
qr{ \A [0-9] \z }smx,
qr{ \A \\N \{ .* \} }smx,
) {
$start =~ $re
or next;
return $content =~ $re;
}
return;
} else {
$self->{_range_start} = $content;
return 1;
}
}
1;
__END__
=head1 SUPPORT
Support is by the author. Please file bug reports at
L<http://rt.cpan.org>, or in electronic mail to the author.
=head1 AUTHOR
Thomas R. Wyant, III F<wyant at cpan dot org>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2009-2018 by Thomas R. Wyant, III
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl 5.10.0. For more details, see the full text
of the licenses in the directory LICENSES.
This program is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of
merchantability or fitness for a particular purpose.
=cut
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